Lorenzo Monaco (circa 1370 - 1423), 1405. Tempera on wood.
I went to a museum yesterday, and saw this, and wanted a picture of it. If I were rich, I'd have bought the painting, but as it is, I bought the postcard. I realised there was no image of this online, so I scanned the postcard and here it is.
For all I know, this is a rather unusual pose of Christ, with His arms on Himself, and it intrigued me. Plus He is a beautiful Christ.
As to the title, with my little Latin knowledge, I think it may mean "man of pain" or "suffering man", or something like that. "Vir" means "man", as in "virility", but it may also mean "life", though I am unsure (I think not).